tests: transform1: make test work with CK_FORK=no

We need to clear some global state and register a new test
basetransform subclass for each test because we do things
in class_init base on global state.

https://bugzilla.gnome.org/show_bug.cgi?id=623469

tests/check/libs/test_transform.c

@@ -28,18 +28,7 @@ GST_STATIC_PAD_TEMPLATE ("sink",
 typedef struct _GstTestTrans GstTestTrans;
 typedef struct _GstTestTransClass GstTestTransClass;
 
-#define GST_TYPE_TEST_TRANS \
+#define GST_TEST_TRANS(obj) ((GstTestTrans *)(obj))
-  (gst_test_trans_get_type())
-#define GST_TEST_TRANS(obj) \
-  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_TEST_TRANS,GstTestTrans))
-#define GST_TEST_TRANS_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_TEST_TRANS,GstTestTransClass))
-#define GST_TEST_TRANS_GET_CLASS(obj) \
-  (G_TYPE_INSTANCE_GET_CLASS((obj), GST_TYPE_TEST_TRANS, GstTestTransClass))
-#define GST_IS_TEST_TRANS(obj) \
-  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_TEST_TRANS))
-#define GST_IS_TEST_TRANS_CLASS(klass) \
-  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_TEST_TRANS))
 
 struct _GstTestTrans
 {
@@ -53,10 +42,6 @@ struct _GstTestTransClass
   GstBaseTransformClass parent_class;
 };
 
-GType gst_test_trans_get_type (void);
-
-G_DEFINE_TYPE (GstTestTrans, gst_test_trans, GST_TYPE_BASE_TRANSFORM);
-
 static GstFlowReturn (*klass_transform) (GstBaseTransform * trans,
     GstBuffer * inbuf, GstBuffer * outbuf) = NULL;
 static GstFlowReturn (*klass_transform_ip) (GstBaseTransform * trans,
@@ -92,6 +77,8 @@ gst_test_trans_class_init (GstTestTransClass * klass)
   gst_element_class_add_static_pad_template (element_class, sink_template);
   gst_element_class_add_static_pad_template (element_class, src_template);
 
+  GST_INFO ("setting up %s", g_type_name (((GTypeClass *) klass)->g_type));
+
   trans_class->passthrough_on_same_caps = klass_passthrough_on_same_caps;
   if (klass_transform_ip != NULL)
     trans_class->transform_ip = klass_transform_ip;
@@ -156,9 +143,24 @@ gst_test_trans_new (void)
   TestTransData *res;
   GstPad *tmp;
   GstPadTemplate *templ;
+  GType type;
+
+  /* we register a new sub-class for every test-run, so the class init
+   * function is called for every test run and can be set up properly
+   * even with CK_FORK=no */
+  {
+    static gint counter = 0;
+    gchar name[100];
+
+    g_snprintf (name, sizeof (name), "GstTestTrans%d", ++counter);
+
+    type = g_type_register_static_simple (GST_TYPE_BASE_TRANSFORM, name,
+        sizeof (GstTestTransClass), (GClassInitFunc) gst_test_trans_class_init,
+        sizeof (GstTestTrans), (GInstanceInitFunc) gst_test_trans_init, 0);
+  }
 
   res = g_new0 (TestTransData, 1);
-  res->trans = g_object_new (GST_TYPE_TEST_TRANS, NULL);
+  res->trans = g_object_new (type, NULL);
 
   templ = gst_static_pad_template_get (sink_template);
   templ->direction = GST_PAD_SRC;

tests/check/libs/transform1.c

@@ -96,6 +96,14 @@ GST_START_TEST (basetransform_chain_pt1)
   gst_test_trans_push_segment (trans);
 
   gst_test_trans_free (trans);
+
+  klass_transform_ip = NULL;
+  klass_transform = NULL;
+  klass_transform_caps = NULL;
+  klass_transform_size = NULL;
+  klass_set_caps = NULL;
+  klass_submit_input_buffer = NULL;
+  klass_generate_output = NULL;
 }
 
 GST_END_TEST;
@@ -879,6 +887,25 @@ GST_START_TEST (basetransform_chain_ct3)
 
 GST_END_TEST;
 
+static void
+transform1_setup (void)
+{
+  sink_template = &gst_test_trans_sink_template;
+  src_template = &gst_test_trans_src_template;
+}
+
+static void
+transform1_teardown (void)
+{
+  /* reset global state */
+  klass_transform_ip = NULL;
+  klass_transform = NULL;
+  klass_transform_caps = NULL;
+  klass_transform_size = NULL;
+  klass_set_caps = NULL;
+  klass_submit_input_buffer = NULL;
+  klass_generate_output = NULL;
+}
 
 static Suite *
 gst_basetransform_suite (void)
@@ -887,6 +914,8 @@ gst_basetransform_suite (void)
   TCase *tc = tcase_create ("general");
 
   suite_add_tcase (s, tc);
+  tcase_add_checked_fixture (tc, transform1_setup, transform1_teardown);
+
   /* pass through */
   tcase_add_test (tc, basetransform_chain_pt1);
   tcase_add_test (tc, basetransform_chain_pt2);

tests/check/libs/transform2.c

@@ -49,10 +49,13 @@ static GstFlowReturn
 collate_submit_input_buffer (GstBaseTransform * trans,
     gboolean is_discont, GstBuffer * input)
 {
-  GstFlowReturn ret =
+  GstBaseTransformClass *tt_parent_class;
-      GST_BASE_TRANSFORM_CLASS
+  GstFlowReturn ret;
-      (gst_test_trans_parent_class)->submit_input_buffer (trans, is_discont,
+
-      input);
+  tt_parent_class =
+      g_type_class_peek_parent (GST_BASE_TRANSFORM_GET_CLASS (trans));
+
+  ret = tt_parent_class->submit_input_buffer (trans, is_discont, input);
 
   if (ret != GST_FLOW_OK)
     return ret;